|
  
- Columbium (Nb) Metal Synonyms:
niobium metal powder, Nb, columbium metal powder, columbium metal granules, niobium metal granules, columbium metal turnings, niobium metal turnings, columbium metal slug, niobium metal slug, columbium metal single crystal, columbium metal sheet, niobium metal sheet, niobium metal single crystal, columbium metal foil, niobium metal foil, columbium metal target, niobium metal target, columbium metal gauze, niobium metal gauze, columbium metal wire, niobium metal wire, columbium metal rod, niobium metal rod, CAS# 7440-03-1
Chemical Name: Niobium
Chemical Formula: Nb
a) Though most metallurgists refer to the metal as columbium, the name niobium was officially adopted by chemical authorities in 1950 after 100 years of controversy.
b) Columbium is steel-gray or silvery-white, but takes on a bluish tint when exposed to air at room temperatures for extended periods. The metal's oxidation in air commences at 200°C. Columbium, when used in alloying, improves strength, and its superconductive properties are enhanced when combined with zirconium.
99.8% up to in some cases 99.99%
Powder, slug, foil, sheet, wire, sputtering target
|
Atomic Number
|
41
|
|
Molecular Weight (g/mol.)
|
92.906
|
|
Apparent Density (g/cm3)
|
8.57
|
|
Thermal Expansion
|
7.3 µm/(m·K)
|
|
Specific Heat @25°C (cal/g-°C)
|
.065
|
|
Melting Point (°C)
|
2468
|
|
Boiling Point (°C)
|
4742
|
|
Thermal Conductivity (cal/s-cm°C)
|
.125
|
|
Electro Negativity
|
1.6 (Pauling scale)
|
|
Magnetic Ordering
|
paramagnetic
|
|
Electrical Resistivity
|
(0 °C) 152 nΩ·m
|
|
Young's Modulus
|
105 GPa
|
|
Crystallography
|
cubic structure, body centered
|
Sodium vapor lamps, corrosion-resistant equipment, superconducting magnets, aerospace parts, alloys, and drill bits.
Drums or boxes
Yes. For further information please call the E.P.A. at 202.554.1404
CAS# 7440-03-1
3089
|
